Fathers' rights campaigners dressed as superheroes have climbed on to the roof of Prime Minister David Cameron's constituency offices in Oxfordshire.

Three members of the New Fathers 4 Justice group scaled the office in Witney.

The group said the stunt was in protest at Mr Cameron's attack on absent fathers on Father's Day this year.

Thames Valley Police said the group was holding a banner and using a megaphone to shout messages.

Other members of New Fathers 4 Justice - which has no links to the well-known Fathers for Justice organisation - watched from below.

'Equal status'

The group said the protesters were Roger Crawford, 62, of Meppershall, Bedfordshire, Jeremy Pogue, 50, of Cefn Hengoed, South Wales, and Archit Ssan 46, of London.

A spokesman said the protest marked the start of the group's "CON-DEM(N) CAMERON" campaign" and it was campaigning to change family law to give fathers equal status to see their children on separation or divorce.

On its website, the group said: "As a result of the CON-DEM's coalition's inability to listen or act on the fatherless society crisis, we are continuing our direct action campaign against MPs this week in a campaign called CONDEM(N)."

Earlier, a Thames Valley Police spokesman said: "We have got officers there, it doesn't seem to be causing any disruption to the community other than the noise."

The stunt comes after one of its members confronted Justice Minister Ken Clarke at his home in West Bridgford, Nottingham, at the weekend.